g(r)=−5r+13
\(g(r)=−5r+13\)
\(Zero\ point:\)
\(g(r)=−5r+13=0\) [ - 13
\(-5r=-13\) [\(:(-5)\)
\(r=\frac{13}{5}=2\frac{3}{5}=2.6\)
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